Portable terminal unit with a dual purpose external connection
AssigneeUniden Corporation
InventorsToshiharu Nakayama, Tateo Masaki
Life of this patent
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Abstract
In portable terminal units each of which has a rechargeable battery and a data processing section, one terminal is used as both a terminal for charging the rechargeable battery and a terminal for connecting a data processing unit to an external data processing unit. First protective circuitry protects the data processing unit from a battery charging current and second protective circuitry eliminates loading of the rechargeable battery due to a data voltage and protects the external data processing unit from charging current for the chargeable battery.
Claims9
A portable terminal unit, which incorporates a chargeable battery and a data processing section, comprising:
- one common terminal which can be used as both a terminal for charging said chargeable battery and a terminal for connecting said data processing section to an external data processing unit;
- first protective means in a data line between said common terminal and said data processing section and which protects said data processing section from a charging current;
- and
- second protective means in a charging line between said common terminal and said chargeable battery for eliminating load to said chargeable battery wherein said first protective means becomes a data line when said external data processing unit is connected to said common terminal and said second protective means becomes a charging line when a charging apparatus is connected to said common terminal.
Dependencies are inferred from the claim text.